|Chu, Chang chi|
Submitted to: Proceedings of Integrated Control in Protected Crops, Mediterranean Climate Congress
Publication Type: Proceedings
Publication Acceptance Date: 11/30/2003
Publication Date: 12/4/2003
Citation: Chu, C., Chen, T., Simmons, A.M., Jackson, C.G., Alexander, P.J., Henneberry, T.J. 2003. Development of light-emitting diode (led) traps for whiteflies and other insects. Proceedings of Integrated Control in Protected Crops, Mediterranean Climate Congress. 26(10): 27-31 Interpretive Summary: There are two types of trap for monitoring whiteflies in greenhouses, yellow sticky card (YC) and plastic cup (PC) traps. We have modified the trap designs by place a lime green LED (light-emitting diode) light on/in the traps to increase trap catches. The LED-YC traps caught more adult greenhouse whiteflies, silverleaf whiteflies, cotton aphids, and fungal gnats compared with the unlit YC traps in shell beans or cotton. The LED-PC traps caught more adult greenhouse whiteflies and silverleaf whiteflies than the unlit PC traps but few Ertmocerus eremicus and Encarsia formosa whitefly parasitoids compared with unlit PC traps. The results demonstrate the potential of using lime green LED-YC traps in greenhouses for insect detection, monitoring, and control. The lime green LED-PC traps appear to be complimentary and compatible for use in combination with releases of whitefly parasites for whitefly nymph control in greenhouses.
Technical Abstract: We equipped yellow sticky card traps and plastic cup traps with 530 nm lime green light-emitting diodes (Nichia America Corp.) (LED-YC and LED-PC traps, respectively) to increase trap efficacies for capturing whiteflies and other insects. More adult greenhouse whiteflies Trialeurodes vaporariorum (Westwood), sweetpotato whiteflies (SPW), Bemisia tabaci (Gennadius) biotype B (= B. argentifolii), cotton aphids Aphis gossypii (Glover), and fungal gnats Bradysia coprophila (Lintner) were caught on lime green LED-YC traps than unlit YC traps in greenhouse cage studies with shell beans, Phaseolus vulgaris (L.) var. humilis, or cotton, Gossypium hirsutum (L.) cv. Deltapine 5415. The lime green LED-YC traps did not catch more Franklinella occidentalis (Pergrande) than the unlit YC traps in commercial greenhouses. Lime green LED-PC traps caught more adult greenhouse whiteflies and SPW than the PC traps with white LEDs or unlit PC traps in a laboratory test. Ertmocerus eremicus (Rose and Zolnerowich) parasite captures were not significantly different in lime green LED-YC traps compared with unlit YC traps. The lime green LED-PC traps caught fewer E. eremicus and Encarsia formosa (Gahan) whitefly parasitoids compared with unlit YC traps in greenhouse tests. The results demonstrate the potential of using lime green LED-YC traps in greenhouses for insect detection, monitoring, and control. The lime green LED-PC traps appear to be complimentary and compatible for use in combination with releases of Eretmocerus or Encarsia for whitefly nymph control in greenhouses.